package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.entity.Setmeal;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.DigestUtils;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 用户MD5加密算法DigestUtils.md5DigestAsHex
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
//        EmployeeDTO对象属性复制
        BeanUtils.copyProperties(employeeDTO, employee);
//        设置账号状态，1表示成功，0表示锁定
        employee.setStatus(StatusConstant.ENABLE);
//        设置密码，默认密码为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

//        设置当前创建时间和修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//
////        创建当前用户和修改当前用
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
        return new PageResult(total,result);
    }

    /**
     * 启用禁用员工账户
     * @param status
     * @param id
     * @return
     */

    public void startOrStop(Integer status, long id) {
        Employee employee=new Employee();
        employee.setStatus(status);
        employee.setId(id);
        employeeMapper.update(employee);


    }

    /**
     * 根据id查询员工信息进行修改
     *
     * @param id
     * @return
     */

    public Employee getById(long id) {
       Employee employee =employeeMapper.getById(id);
       employee.setPassword("****");
        return employee;
    }

    /**
     * 编辑修改员工信息
     * @param employeeDTO
     * @return
     */

    public void update(EmployeeDTO employeeDTO) {
//        复制employeeDTO的属性到employee
        Employee employee=new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
//        修改编辑时间和用户
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);


    }

    /**
     * 修改密码
     * @param passwordEditDTO
     */
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO, HttpServletRequest request) {

        Cookie[] cookies = request.getCookies();
        if (cookies == null){
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }

        // 通过cookie获取用户的name
        String username = null;
        for (Cookie cookie : cookies) {
            if (cookie.getName().equals("username")) {
                username = cookie.getValue();
                break;
            }
        }

        // 获取旧密码
        Employee employee = employeeMapper.getByName(username);

        // 匹配旧密码
        if (!DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes()).equals(employee.getPassword())) {
            // 匹配失败，抛出业务异常
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }

        employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));

        employeeMapper.update(employee);
    }



}
